Home / 10,215.18-15,320.93-2,817.80

Finding the Fourth Proportional to 10,215.18, 15,320.93 and 2,817.80

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Solution

The fourth proportional to 10,215.18, 15,320.93 and 2,817.80 is: 4,226.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215.18 : 15,320.93 = 2,817.80 : x
  2. Step 2: Convert to fraction form
    10,215.18/15,320.93 = 2,817.80/x
  3. Step 3: Cross multiply
    10,215.18x = 15,320.93 × 2,817.80
  4. Step 4: Simplify right side
    10,215.18x = 43,171,385.34
  5. Step 5: Solve for x
    x = 43,171,385.34/10,215.18
  6. Step 6: Final answer
    x = 4,226.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.